1/*
2 * Copyright (C) 2018 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include "Length.h"
29#include <wtf/text/TextStream.h>
30
31namespace WebCore {
32
33class TextUnderlineOffset {
34public:
35 static TextUnderlineOffset createWithAuto()
36 {
37 return TextUnderlineOffset(Type::Auto);
38 }
39
40 static TextUnderlineOffset createWithLength(float length)
41 {
42 TextUnderlineOffset result(Type::Length);
43 result.setLengthValue(length);
44 return result;
45 }
46
47 bool isAuto() const
48 {
49 return !isLength();
50 }
51
52 bool isLength() const
53 {
54 return static_cast<bool>(m_length);
55 }
56
57 void setLengthValue(float length)
58 {
59 ASSERT(isLength());
60 m_length = length;
61 }
62
63 float lengthValue() const
64 {
65 ASSERT(isLength());
66 return *m_length;
67 }
68
69 float lengthOr(float defaultValue) const
70 {
71 return m_length.valueOr(defaultValue);
72 }
73
74 bool operator==(const TextUnderlineOffset& other) const
75 {
76 return m_length == other.m_length;
77 }
78
79 bool operator!=(const TextUnderlineOffset& other) const
80 {
81 return !(*this == other);
82 }
83
84private:
85 enum class Type {
86 Auto,
87 Length
88 };
89
90 TextUnderlineOffset(Type type)
91 {
92 if (type == Type::Length)
93 m_length = 0;
94 }
95
96 Optional<float> m_length;
97};
98
99inline TextStream& operator<<(TextStream& ts, const TextUnderlineOffset& offset)
100{
101 if (offset.isAuto())
102 ts << "auto";
103 else
104 ts << TextStream::FormatNumberRespectingIntegers(offset.lengthValue());
105 return ts;
106}
107
108} // namespace WebCore
109